Tonight, a brewing controversy here in New York City taking a turn. They are a tourist attraction. The horse-drawn carriages. Many arguing they are inhumane. Some well-known names arguing they should be allowed to stay. Here's Ryan smith. Reporter: Horse-drawn carriages. Their romance immortalized in bare footein the park and sex and the city. A must-do for thousands of tourists visiting New York every year. Is the mayor wants to do away with all that. In humane society, I really believe this -- horses do not belong in the middle of the traffic in new York City. Reporter: Not going to happen. That is if Liam Neeson has anything to say about it. Listen to me. Reporter: The star of the movie "Taken" becoming the face of a battle to keep horse-drawn carriages after making his case on "The daily show." The organizations want to put out all this false information about how the horses are treated. These guys treat the horses like their children. Reporter: Then, penning an op-ed. In "The New York times" arguing that quote, horses, much like humans, are at their happiest and healthiest when working. The focus on the bans this weekend focused on him. Outside his apartment this weekend. Singer pink to lea Michele are supporters. The stalls lack adequate bedding. Reporter: Scenes like these stirring concern about the safety. What is the matter with you people? Reporter: Cities like London, Paris and others have banned the practice. People we talked to in New York City hoping that they stay. One of those things you don't want to get rid of. It's like a landmark in the city. Reporter: This issue could come to a head soon. In a vote goes his way, the mayor plans to replace them with vintage electric cars. Ryan smith, thank you. When we come back, why miss

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